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Ask GM Tech (Cam) Your Own Question
GM Tech (Cam)
GM Tech (Cam), GMC Mechanic
Category: GM
Satisfied Customers: 5789
Experience:  GM Grand Master Technician 2007. 14 years experience.
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GM Sierra: front brakes heating up, just replace EBCM and BPMV,

Customer Question

front brakes heating up, just replace EBCM and BPMV, to hot to touch rim, tires also very hot
Submitted: 2 years ago.
Category: GM
Expert:  Gary replied 2 years ago.
I am sorry for the long waitwas it doing this before any of that work was done to this truck ?
Customer: replied 2 years ago.

The right front tire started to wobble as there was a pull on the tire. On stopping the tire rim was very hot. The brakes were being applied. towed to a shop. the pads , callipers etc were replaced. 100 Km later the same thing, ran with no grabbing until about 50 km then same thing. pads etc were replaced, line drained. Truck driven home sat 4 months. Took it out and 50km later same thing again. took to GM dealer they replaced the EBCM and BPMV due to code C0263. They said the truck was ready to go. Took truck home after worked on. Truck started to grab on the brakes in front again. very hot, tire started to wobble at 100km hr. Appeared to grab about 50 km per hour. Stopped and took temp of rim, 146 degrees C. To hot to touch. The pad looks black again.

Customer: replied 2 years ago.

Sorry for delay, had to go out of town until tonight. Sent reply a min. ago.

thanks

Expert:  Gary replied 2 years ago.
can you get this to act up enough to do some tests to narrow the cause of this issue ?
Customer: replied 2 years ago.

yes

Expert:  Gary replied 2 years ago.
Garth get the wheel to lock up and drag bad then while its like that open the brake lines off the master cylinder will it unlock the dragging wheel ?
Customer: replied 2 years ago.

will try, not wireless wi fi , will respond shortly from desk computer

Expert:  Gary replied 2 years ago.
if it doesn't unlock the brake then tighten those master cylinder lines and loosen the steel brake line into the rubber flex hose for the locked up wheel will it unlock ?
Customer: replied 2 years ago.

Both front brakes appeared to be grabbing, As i do not have the truck in the garage finding not possible at this time to work on it in the driveway. Will have to try tomorrow. Thunder storm starting.

Have a question, when parts replaced the brake fluid should have been totally removed and replaced, if not would contaminated fluid still be in the line? Noticed before and just now there appears to be a different fluid, i.e. looks like something in the cylinder liquid at the bottom. as the right front was the only one grabbing before and now both front pads, is it possible there was not a complete flush? And with the replacement pump pushing the liquid having an affect?

Expert:  Gary replied 2 years ago.
yes it is very possible there is still some contaminated brake fluid in the master cylinder causing this issue
ok let me know